html,body,ul,li,ol,dl,dd,dt,p,h1,h2,h3,h4,h5,h6,form,fieldset,legend,img,input,figure,figcaption{
    margin:0;
    padding:0;
}
/*高度塌陷 万能清除法*/
.Universal:after{
    content:".";
    display: block;
    clear: both;
    height: 0;
    overflow: hidden;
    visibility:hidden;
}
/*
*{
     让所有的元素触发怪异盒模型 
    box-sizing: border-box;
}*/
h1,h2,h3,h4,h5,h6{
    font-size:16px;
    font-weight: normal;
}
ul,ol,li{
    list-style:none;
}
a,u{
    text-decoration: none;
}
b,strong{
    font-weight: normal;
}
em,i{
    font-style:normal;
}
img{
    border:0;
    display:block;
    /*清除图片下面的大于3px的间距*/
}
input{
    outline:none;
    display:block;
    border: 0px;
    background: 0px;
}

.fl{
    float: left;
}

.fr{
    float: right;
}

